Siemens 7MF0330 - Page 30

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K
2
K
8
Measurement assembly on an open container
Formula:
Lower range value: p
MA
= ρ · g · h
U
Upper range value: p
ME
= ρ · g · h
O
h
U
Lower filling level Δp
MA
Lower range value
h
O
Upper filling level Δp
ME
Upper range value
p Pressure ρ Density of the measured medium in the
container
g Acceleration due to gravity
Mounting on closed container
When taking measurements in a closed container without or with little condensate formation,
the negative pressure line is not filled.
Installing/mounting
4.3 Installation (level)
SITRANS P320/P420 with 4 to 20 mA/HART
30 Compact Operating Instructions, 09/2018, A5E38874562-AB